[MacPorts] #64618: Forcing port to find tarball locally instead of macports.org?

[MacPorts]

#64618: Forcing port to find tarball locally instead of macports.org?
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  Reporter:  gaming-hacker  |      Owner:  (none)
      Type:  request        |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  guide          |    Version:  2.7.1
Resolution:                 |   Keywords:  local tarball, local source
      Port:                 |
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Comment (by ryandesign):

 If you want MacPorts to add your local URL to all Portfiles, there is the
 `master_site_local` macports.conf setting and the `MASTER_SITE_LOCAL`
 environment variable however they may not work as you expect; I'm not sure
 whether they work as intended since the intention was never documented.
 See #62143.

 If you want MacPorts not to check checksums, you can write `checksum.skip
 yes` into the Portfile.

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Ticket URL: <https://trac.macports.org/ticket/64618#comment:4>
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